Hydrothermal preparation and luminescence of LaF3:Eu3+ nanoparticles.
Hydrothermal preparation and luminescence of LaF3:Eu3+ nanoparticles.
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DOI：
10.1016/j.saa.2006.02.025
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Meng;Mao-feng Zhang;Ying-liang Liu;S. Man
中科院分区：
文献类型：
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作者：
J. Meng;Mao-feng Zhang;Ying-liang Liu;S. Man
通过简单的低温水热法制备了 LaF3:Eu3+ 纳米粒子，并通过 X 射线衍射 (XRD)、透射电子显微镜 (TEM) 和荧光光谱进行了表征。获得了分散良好的六角形纳米粒子，平均尺寸为30nm。研究了反应温度和时间对LaF3:Eu3+纳米颗粒的制备和发光的影响。与块状 LaF3:Eu3+ 相比，发光猝灭发生在更高的浓度 (∼25mol%) 和更强的发光强度。 LaF3:Eu3+纳米颗粒的荧光强度随煅烧温度变化显着。研究发现，未经任何进一步煅烧的样品可以发出相当强的荧光。
LaF3:Eu3+nanoparticles were prepared by a simple hydrothermal process at low temperature and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and fluorescence spectrum. Well-dispersed nanoparticles with an average size of 30nm and a hexagonal shape were obtained. The influences of reaction temperature and time on the preparation and luminescence of LaF3:Eu3+nanoparticles were investigated. Luminescent quenching occurred at a much higher concentration (∼25mol%) and stronger luminescent intensity than in bulk LaF3:Eu3+. Fluorescence intensity of the LaF3:Eu3+nanoparticles varied remarkably with calcination temperatures. It was found that samples without any further calcinations can emit quite strong fluorescence.